at Dixon Entrance, Beaufort Sea, Strait of Juan de Fuca,
and around the disputed Machias Seal Island and North Rock; The
Bahamas have not been able to agree on a maritime boundary; US Naval
Base at Guantanamo Bay is leased from Cuba and only mutual agreement
or US abandonment of the area can terminate the lease; Haiti claims
US-administered Navassa Island; US has made no territorial claim in
Antarctica (but has reserved the right to do so) and does not
recognize the claims of any other state; Marshall Islands claims
Wake Island

Uruguay
uncontested dispute with Brazil over certain islands in the
Quarai/Cuareim and Invernada streams and the resulting tripoint with
Argentina

Uzbekistan
prolonged drought and cotton monoculture creates
water-sharing difficulties for Amu Darya river states; delimitation
with Kazakhstan complete with demarcation underway; delimitation is
underway with Kyrgyzstan but serious disputes around enclaves and
elsewhere continue to mar progress for some 130 km of border; talks
continue with Tajikistan to determine and delimit border

Vanuatu
Matthew and Hunter Islands east of New Caledonia claimed by
Vanuatu and France

Venezuela
claims all of the area west of the Essequibo River,
preventing any discussion of a maritime boundary; Guyana has
expressed its intention to join Barbados in asserting claims before
UNCLOS that the Trinidad and Tobago's maritime boundary with
Venezuela extends into their waters; maritime boundary dispute with
Colombia in the Gulf of Venezuela and the Caribbean Sea; US, France
and the Netherlands recognize Venezuela's claim to give full effect
to Aves Island, which creates a Venezuelan EEZ/continental shelf
extending over a large portion of the Caribbean Sea; Dominica, Saint
Kitts and Nevis, Saint Lucia, and Saint Vincent and the Grenadines
protest Venezuela's claim that Aves Island sustains human habitation
and other states' recognition of it

Vietnam
demarcation of the land boundary with China continues, but
maritime boundary and joint fishing zone agreement remains
unimplemented; Cambodia and Laos protest Vietnamese squatters and
armed encroachments along border; China occupies Paracel Islands
also claimed by Vietnam and Taiwan; involved in complex dispute with
China, Malaysia, Philippines, Taiwan, and possibly Brunei over the
Spratly Islands; the 2002 "Declaration on the Conduct of Par